20474+3629 STT 413AB (Lam Cyg)

 
 
20h 47m 24.53s +36 29' 26.7" P.A. 358.5 sep 0.92 mag 4.73,6.26 Sp B5Ve dist. 235.85 pc (769.34 l.y.)
 
 
Coord 2000
20474+3629
Discov num
STT 413
Comp
AB
Coord arcsec 2000
20 47 24.53 +36 29 26.7
Date first
1842
Date last
2017
Obs
418
Pa first
117
Pa last
6
P.A. Now (θ)
358.5°
Sep first
0.7
Sep last
1.0
Sep. Now (ρ)
0.92"
Mag pri
4.73
Mag sec
6.26
delta mag (ΔM)
1.53
Spectral class
B5Ve (blue-white)
Pri motion ra
+015
Sec motion ra
Pri motion dec
-008
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
20474+3629 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 70505 20474+3629 MCA 63 Aa,Ab 1978 1991 21 125 0.0 5.40 5.80 0.40 Y
Show Lam Cyg 70505 20474+3629 STT 413 AB 1842 2017 418 358 0.9 4.73 6.26 1.53 Y <===
Show 20474+3629 S 765 AC 1834 2012 27 106 82.9 4.76 9.65 4.89
Show 20474+3629 FYM 126 AF 1998 2012 3 119 52.0 4.76 14.00 9.24
Show 20474+3629 FYM 126 CD 1998 2015 4 112 9.4 9.65 14.00 4.35
Show 20474+3629 FYM 126 CE 1998 2012 3 207 40.1 9.65 13.60 3.95
Septuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
5.5
Precise sep
1
Name
Lam Cyg
Constellation
Cygnus
SAO
70505
HIP
102589
Gaia DR2
03225039872
HD
198183
HR
7963
GC
28994
ADS
14296
BD
BD+35 4267
Bayer
Lambda Cygni
Bayer name
Lam Cyg
Flamsteed
54 Cygni
Flamsteed name
54 Cyg
Distance
235.85
Distance ly
769.34
last precise pa
5.5
last precise sep
1
 
 
ORBITAL ELEMENTS
 
 
Period (P)391.3y Periastron (T)1795y Semi-major axis (a)0.777a
Eccentricity (e)0.45 Inclination (i)133.8° Longitude of periastron (ω)298.4°
Node (Ω)138.6° Note Grade4(1=Definitive, 9=Indet.)
Equinox1900 Last observation1946
label rho theta
2000 0.890 6.5
2001 0.892 6.0
2002 0.894 5.6
2003 0.896 5.2
2004 0.897 4.7
2005 0.899 4.3
2006 0.901 3.9
2007 0.903 3.5
2008 0.905 3.0
2009 0.906 2.6
2010 0.908 2.2
2011 0.910 1.8
2012 0.911 1.4
2013 0.913 1.0
2014 0.915 0.6
2015 0.916 0.2
2016 0.918 359.7
2017 0.919 359.3
2018 0.921 358.9
2019 0.922 358.5
2020 0.923 358.1
2021 0.925 357.7
2022 0.926 357.3
2023 0.927 356.9
2024 0.928 356.5
2025 0.930 356.1
2026 0.931 355.7
2027 0.932 355.3
2028 0.933 354.9
2029 0.934 354.5
2030 0.935 354.1

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds20474%2B3629b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20474+3629 STT 413 AB 2007 400 4 0.9 4.73 6.26 NOD 204724.53+362926.7
20474+3629 STT 413 AB 2010 409 3 0.9 4.73 6.26 NOD 204724.53+362926.7
20474+3629 STT 413 AB 2013 417 5 1.0 4.73 6.26 B5Ve NOD 204724.53+362926.7
20474+3629 STT 413 AB 2014 402 5 0.9 4.73 6.26 B5Ve NOD 204724.53+362926.7
20474+3629 STT 413 AB 2015 405 2 1.0 4.73 6.26 B5Ve NO 204724.53+362926.7
20474+3629 STT 413 AB 2016 408 4 1.1 4.73 6.26 B5Ve NO 204724.53+362926.7
20474+3629 STT 413 AB 2017 418 6 1.0 4.73 6.26 B5Ve NO 204724.53+362926.7

If you need more information about this double, apply for a data request form to the WDS.